Rép. : Re: [rtl] Hi - gmtime()

["Marc LE DOUARAIN" <mledouarain@garbarini.com>]

Hello !

Here what I use to achieve that :

in my RT module, I have :

#include "rtlinux_gmtime_addon.h"
void display_date_time(){	time_t time32bits;	struct tm * ptr_tm;	int dy,mh,yr,hr,mn,sc;	time(&time32bits);	ptr_tm = gmtime(&time32bits);   /* from rt_linux_gmtime_addon.h	dy = ptr_tm->tm_mday;	mh = ptr_tm->tm_mon+1;	yr = ptr_tm->tm_year+1900;	hr = ptr_tm->tm_hour;	mn = ptr_tm->tm_min;	sc = ptr_tm->tm_sec;	rtl_printf("Date/Time : %02d/%02d/%02d-%02d:%02d:%02d\n",dy,mh,yr,hr,mn,sc);}
I haven't succeded in using standart gmtime and mktime from the libc... if someone can help?


>>> ksitaram@hclt.com 07/07/01 17h48 >>>
Hi Silva and all,

  Thanks for the info.
  I tried using do_gettimeofday but it is giving time in seconds and micro
seconds.
  But my purpose is i need current time in some readable format, say,
HH:MM:SS
  Similar way i need to get current date in some readable format say,
MM/DD/YY or DD/MM/YY or some other fomat.

  Are there any RT Linux functions to retrieve or set the date and time in
the above specified formats.

Thanks,
sitaram


----- Original Message -----
From: Sergio Rui Silva <ee98153@fe.up.pt>
To: <rtl@fsmlabs.com>
Sent: Tuesday, June 19, 2001 8:16 AM
Subject: Re: [rtl] Hi


> Yes it does. Besides suporting do_gettimeofday and do settimeofday it also
> suports reading and changing a variaty of other clocks like CLOCK_REALTIME
> and CLOCK_GPOS. Beware that RTLinux can use many kinds of clocks and that
if
> you want to read the system time (Linux time) you should use CLOCK_GPOS or
> do_gettimeofday.
>
> Sergio Rui Silva
>
> FEUP
>
> Em Sexta 06 Julho 2001 16:17, escreveste:
>
> > > Hi all,
> >
> > Does RT Linux support functions to set or get current date and time.
> >
> > Thanks,
> > Sitaram
> >
> > SMILE  A  LOT  IT  COSTS  NOTHING
>
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#ifndef __RTLINUX_TIME_ADDON__
#define __RTLINUX_TIME_ADDON__
#include <time.h>

struct tm
{
	int tm_sec;
	int tm_min;
	int tm_hour;
	int tm_mday;
	int tm_mon;
	int tm_year;
	int tm_wday;
	int tm_yday;
	int tm_isdst;
	long int __tm_gmtoff;
	__const char *__tm_zone;
};

static void __tm_conv(struct tm *tmbuf, time_t *timep, time_t offset);
static struct tm *gmtime(time_t *timep);




/* This is a translation from ALGOL in Collected Algorithms of CACM. */
/* Copied from Algorithm 199, Author: Robert G. Tantzen */
static void __tm_conv(tmbuf, timep, offset)
struct tm *tmbuf;
time_t *timep;
time_t offset;
{
	static int moffset[] =
		{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };

	long s;
	long j, d, m, y;

	offset += *timep;

	tmbuf->tm_isdst = 0;		/* Someone else can set this */

	j = offset / 86400L + 719469;
	s = offset % 86400L;

	if (s < 0) {
		s += 86400L;
		j--;
	}

	tmbuf->tm_sec = s % 60;
	tmbuf->tm_min = (s / 60) % 60;
	tmbuf->tm_hour = s / 3600;

	tmbuf->tm_wday = (j + 2) % 7;

	/*
	 * Julian date converter. Takes a julian date (the number of days since
	 * some distant epoch or other), and fills tmbuf.
	 */

	y = (4L * j - 1L) / 146097L;
	j = 4L * j - 1L - 146097L * y;
	d = j / 4L;
	j = (4L * d + 3L) / 1461L;
	d = 4L * d + 3L - 1461L * j;
	d = (d + 4L) / 4L;
	m = (5L * d - 3L) / 153L;
	d = 5L * d - 3 - 153L * m;
	d = (d + 5L) / 5L;
	y = 100L * y + j;
	if (m < 10)
		m += 2;
	else {
		m -= 10;
		++y;
	}

	tmbuf->tm_year = y - 1900;
	tmbuf->tm_mon = m;
	tmbuf->tm_mday = d;

	tmbuf->tm_yday = d + moffset[m];
	if (m > 1 && ((y) % 4 == 0 && ((y) % 100 != 0 || (y) % 400 == 0)))
		tmbuf->tm_yday++;
}



static struct tm *gmtime(timep)
time_t *timep;
{
	static struct tm tmb;

	__tm_conv(&tmb, timep, 0L);

	return &tmb;
}

#endif